Nerf Venturi Accelerator

This venturi annulus is, so far, untested. I estimate its pressure reduction ratio to be somewhere between 5:1 and 10:1, and volume increase is proportional to pressure decrease.

This is intended as a pneumatic alternative to an afterburner flywheel cage for Nerf blasters, particularly homemades.

The two primary advantages are that, for one, a Venturi doesn't have spin-up time, and secondly, the glass ceiling of flywheels no longer applies. There is no dart wear, since this does not operat